John young



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UNITED STATES PATENT OFrICE6 JOHN YOUNG, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WESTERN ELEC- TRIC COMPANY, OF SAME PLACE.

Fl RE-ALARM SIG NAL-BOX.

. SYECIFICATION forming part of Letters Patent No. 437,668, dated September 30, 1890.

Application filed March 26, 1887. Serial No. 232.605. (No model.)

To all'wwm it may concern: The circuits of the box may be traced from Be it known that I, JOHN YOUNG, a citizen binding-post a, by wire a', through electroof the United States, residing at Chicago, in magnet d, and thence to the circuit-spring c, the county of Cook and State of Illinois, have and thence through the break-wheel f, and 55 invented a certain new and useful Improvethence through the metallic portions ot' the ment in Fire-Alarm Signal-Boxes, of which the box to point a2, and thence by wire g to post following is a full, clear, concise, and exact deb. In the bottom of the box the usual switch scription, reference being had to the accoma3 is provided for shunting the electro-magpanying drawings, forming a part of this net out of circuit. 6o ro specification. The box is shown set ready to be started My invention relates to an automatic iireby the closing of the circuit at binding-post alarm, and more especially to the signal-box b. Closing the circuits energizes the electrodescribed in my patent, No. 313,040, of Febmagnets, and the armature-lever h is moved ruary 24, 1885. In my said patented box, in so as to release the arm c', and the clock- 65 case the circuit is momentarily closed, the spring sets the break-wheel in motion, carrysignal Will be sent a less number of times ing with it the said arm t. As the stud k than when the circuit is closed continuously. comes under the convex scmicircular piece Z My invention herein consists in an attachof the ground-circuit, closing lever m, said ment adapted to be applied to said patented lever m is lifted to close the circuit to ground 7o zo box, by means of which theAbreak-wheel will at point n. Thus in any event the circuit be started automatically immediately after will be closed to ground during a portion of its first revolution, so that the break-Wheel each revolution,since in this manner the Wire will, when once started in case of true alarm, g will be connected from contact n to bindmake two revolutions instead of one, as hereing-post c, which binding-post c is provided 25 tofore, and thus the signal will be repeated with a ground-connection. The stud kleaves four times instead of twice. In case of a false the portion l of lever m as arm 'L' approaches alarm-that is, a moment-ary closing of the stop o, so that the ground-connection is circuit-the signal will be sent in once only, broken at n, so that the box Will be open in as heretofore, but the circuit will be left case the box was started accidentally. When 8o 3o closed through the box by means of my atthe arm t' has completed its revolution, or

tachment, so that in case of a true alarm berather just before it has completed its revoluing sent in before the attachment has reset tion, it is arrested by the stop 0 in case of the box the break-Wheel Will be set in motion false alarms; but in case of true alarms it is and make one full revolution. helped over said stop o by the circuit being 3 5 My invention is illustrated in the accomclosed through wire t to contact s, arm e', and panying drawings, in Whichbreak-Wheel f. The circuit of the box is left Figure l is a front View of a signal-box proopen between circuit-springcand break-wheel vided with my attachment for closing the after a signal has been sent in-that is to circuit so as to start the break-wheel a second say, when the arm t' is arrested by stop o the 9o 4o time. Fig. 2 is a detail view of the circuitwheel f will be in such position that the closing attachment and the arm which is carspring e Will not be in contact With any of ried by the break-wheel about to close upon the teeth of the break-Wheel. As heretofore the same. constructed, the break-wheel is thus stopped Like parts are indicated by similar letters and left open at the first revolution. By my 45 of reference throughout the diiferent figures. invention herein the circuit is closed through The binding-post a may be connected to a shunt automatically formed around the lineleadingtothebattery,register,andground break between the spring and break-Wheel at the central station. Binding-post b may as the arm t' is about to strike against stop o, be connected to the thermostats throughout and thus the armature-lever h is drawn down roo 5o the building. Binding-post cis connected to and stop o is carried out of the path of the ground.I pin on the arm i, and thus the break-wheel,

I .i IMM and with it arm c', is carried by the clockspring around a second time in case the circuit is closed at binding-post b. The second time, however, the circuit of the shunt will not be closed, as the wheel p is turned the iirst time far enough to carry the contact thereon out of reach of the arm, and hence the arm is arrested by stop o just before the second revolution is complete.

My automatic shunt-closer consists of a Wheel p, mounted, preferably, on an insulated bracket q. From this Wheelp projects an arm fr. Back of this arm is placed the ribbon s, preferably of platinum, which serves as an electrical connection between the arm z' and the Wheel p. This Wheel'is normally set in the position shown,.so as to bring the ribbon s 4and also the arm r into the path of the arm i as said arm i approaches the stop o. The wheel p is connected by wire t with thecircuit-spring e, and arm i is connected with the break-Wheel. Thus as the arm il has about completed its revolution it comes against ribbon s, and, pressing said ribbon against arm r,-

the circuit is closed through ythe shunt thus formed and remains closed until the arm in its revolution, carrying with it the arm r, passes out ot contact with said arm r or the contact-ribbon s. The wheel p is thus turned upon its axis far enough to take the arm r out of the path of the arm t', and hence the second time the arm t' comes around it will iind stop o in its path and be stopped, leaving the circuit of the box open between Athe circuit-spring e and the break-Wheel. Thus in case of true alarms, when wheel p is properly set, the signal 91 will be repeated four times, and in case of an accidental moment ary closing of the circuit through the box the signal will be sent in once only.

It will be seen that the signal is made thus more certain and the usefulness of the box lnuch enhanced.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a signal-box, the combination, with the break-wheel and circuit-closer, of an arm carried by the break-wheel and a ground-connection closed to said arm during about onehalf ot its revolution, avstop upon the armature-lever for arresting said arm, and an automatic shunting device in the path of the arm moving with the break-wheel, whereby the circuit may be closed through the electro-magnet to carry the stop out of the path of the said arm automatically, as described.

2. The combination, with the break-wheel provided with characters repeated thereon, ot' the circuit-spring, the clock-work, and the starting mechanism, said clock-Work being connected with the break-wheel to actuate the same and the said starting mechanism consisting of an electro-magnetic device provided with a stop normally in the path of an arm carried by the break-wheel and a shunt t from the circuit-spring to a movable contact 'in the path of the said arm' carried by the brealewheel, whereby in-case of a true alarm the break-wheel is started a second time automatically to repeat the signals thereon, substantially as and for the purpose specified.

3. The combination, with the break-Wheel of a signal-box, said break-wheel carrying an arm or lever 1I, ot' a shunt-ing device or contact,

against which said lever is closed upon its first revolution, said shuntingdevice being connected between the electro-magnet of the box and the circuit-spring, whereby a shuntcircuit is closed momentarily between the electro-magnet and the break-Wheel to release A the break-wheel asecond time, substantially as and for the purpose specified:

. In witness whereof I hereunto subscribe my name this 12th day of February, A. D. 1887.

JOHN YOUNG.

Witnesses:

WM. M. GILLER, GEORGE P. BARTON. 

